25516099258 has 16 divisors (see below), whose sum is σ = 41265350280. Its totient is φ = 11763222336.

The previous prime is 25516099253. The next prime is 25516099277. The reversal of 25516099258 is 85299061552.

It can be written as a sum of positive squares in 4 ways, for example, as 23398903089 + 2117196169 = 152967^2 + 46013^2 .

It is not an unprimeable number, because it can be changed into a prime (25516099253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536713 + ... + 582316.

Almost surely, 2^25516099258 is an apocalyptic number.

25516099258 is a deficient number, since it is larger than the sum of its proper divisors (15749251022).

25516099258 is a wasteful number, since it uses less digits than its factorization.

25516099258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119921.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 25516099258 in words is "twenty-five billion, five hundred sixteen million, ninety-nine thousand, two hundred fifty-eight".